Compilare: user.cpp: In function ‘int main()’: user.cpp:19:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<V.size();++i) ^ user.cpp:22:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1;i<=V.size();++i) ^ user.cpp:27:49: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] {c[1]=1; dr[1]=i; if( m[a[i]]==V.size()) ^ user.cpp:41:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if( m[a[i]]==V.size()) ^